Porphyrialike bullous dermatosis after chronic intense tanning bed and/or sunlight exposure.

Five fair-skinned patients had porphyrialike blisters and mechanical fragility of skin chronically exposed to intense radiation from tanning devices and/or the sun, but they had normal red blood cell, plasma, urine, and stool porphyrin levels. Use of several weak photosensitizing drugs during the year before or while developing lesions was identified or suspected in four patients.